Basement conversions fluctuate in cost depending on project scale, professionals hired and location. If your basement conversion doesnât need any construction work, then it should cost relatively little. However, the majority of projects at least need damp proofing and water proofing work, if not insulation, heating, electrical work and more. This means that even smaller basement conversion projects are still relatively expensive. The average UK cost ranges from £30,000 - £50,000.
| Avg. price low | Avg. price low |
|---|---|
| Avg. price | Avg. price |
| Avg. price high | Avg. price high |
£46500
£34875
£23250
£11625
£0
| Labour cost | £28,000 | |
| Material cost | £10,000 | |
| Waste removal | £2,000 |
Requests for quotations in London County in August 2024
Requests for Basement renovation quotations in London County in August 2024. 0% change from July 2024.
Requests for Basement renovation quotations in Greater London in August 2024. 0% change from July 2024.
From past fifteen years we have been established as the finest building and construction service provider to clients in Bromley and its surrounding areas.
Very friendly and helpful.
London - E12
Enquiry from: Selvi R
Start Date: Immediate
Cellar need damp proff wirk
London - N4
Enquiry from: Melissa T
Start Date: Immediate
Cellar modernisation - small terraced Victorian with existing, working cellar - being used for storage and laundry room. Just needs tidying up and shelving/storage sorted.
London - SW2
Enquiry from: June W
Start Date: 1 to 3 months
i need to make a whole in the wall to fit 2 windows are you the property owner: owner of the property property type: other how many rooms are currently within the basement: 1 room how many rooms do yo...
London - SE14
Enquiry from: Douglas H
Start Date: Immediate
basement tanking/waterproofing and maybe additional works as required are you the property owner: owner of the property property type: terrace how many rooms are currently within the basement: 1 room ...
London - N22
Enquiry from: Aktas C
Start Date: Immediate
Hello Sir/Madam, good afternoon we are Aktas. Cleaning service we are doing deep cleaning after building work cleaning floor cleaning after party cleaning commercial cleaning weekly cleaning one ofte...
London - NW1
Enquiry from: Rachel W
Start Date: Immediate
i have 2 vaults that need to be dug out and damp proofed. i am looking for someone to design and apply for the planning permission also are you the property owner: owner of the property property type:...
London - N22
Enquiry from: Aktas C
Start Date: Immediate
Hello Sir/Madam, good afternoon we are Aktas. Cleaning service we are doing deep cleaning after building work cleaning after party cleaning commercial cleaning weekly cleaning one often cleaning s...
London - SW17
Enquiry from: Ben M
Start Date: Immediate
Basement window installation.
London - E7
Enquiry from: Sami M
Start Date: Immediate
Small amount of damp has risen due to rain water outside.
London - SE10
Enquiry from: Tony H
Start Date: Immediate
waterproof basement and treat walls in basement for rising damp. basement dimensions are 3mx4mx1m (height) are you the property owner: owner of the property property type: terrace how many rooms are ...
London - SW4
Enquiry from: William F
Start Date: Immediate
Damp identified on lower ground floor. Front to back, including from water ingress from recent downpour/flooding in the area. Rectification, damp proofing and sump required - for long-term fix. Area ...
London - SE3
Enquiry from: Nathanael G
Start Date: Immediate
We are looking to install a new light well in our converted basement room. It's currently made of old 'swimming pool glass blocks' with a wooden frame, but it has started to leak (wooden frame has rot...
London - SE3
Enquiry from: Nathanael G
Start Date: Immediate
We are looking to install a new light well in our converted basement room. It's currently made of old 'swimming pool glass blocks' with a wooden frame, but it has started to leak (wooden frame has rot...
London - SE3
Enquiry from: Nathanael G
Start Date: Immediate
We are looking to install a new light well in our converted basement room. It's currently made of old 'swimming pool glass blocks' with a wooden frame, but it has started to leak (wooden frame has rot...
Bromley - BR1
Enquiry from: Rob T
Start Date: Less than one month
basement conversion, i have a basement under my house, total area 75 sq meters, you can stand in 2 thirds 4 ft in the rest, rear door entrance, door at front for conveyor belt, i have planning but no...
London - N1
Enquiry from: Pietro P
Start Date: Immediate
Hello We are looking for correcting dampness in a grade ii listed building basement - terraced townhouse. Details: The floor surface is damp below but there is no staining apparent to the foo...
Bromley - BR1
Enquiry from: Rob T
Start Date: Less than one month
basement conversion, i have a basement under my house, total area 75 sq meters, you can stand in 2 thirds 4 ft in the rest, rear door entrance, door at front for conveyor belt, i have planning but no...
London - NW4
Enquiry from: Adrian D
Start Date: Immediate
Sump tanking system for two basement rooms floor area 6x4/ meters And wall height 3 meters
Bromley - BR1
Enquiry from: Rob T
Start Date: Less than one month
basement conversion, i have a basement under my house, total area 75 sq meters, you can stand in 2 thirds 4 ft in the rest, rear door entrance, door at front for conveyor belt, i have planning but no...
Bromley - BR1
Enquiry from: Rob T
Start Date: Less than one month
basement conversion, i have a basement under my house, total area 75 sq meters, you can stand in 2 thirds 4 ft in the rest, rear door entrance, door at front for conveyor belt, i have planning but no...
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Would highly recommend, they found me a firm which I was happy with a quote they give me and went ahead and had my job done within 2 days of enquiring.
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Whether a basement is worth converting depends on your location and how much work it requires.
A basement conversion can be a great way to add space to your home, and can raise your property value. However, it can also be one of the most expensive ways to do this, so if there’s a possibility to extend your property, or convert a loft or garage, it’s worth considering this first.
You should also compare how much your basement conversion will cost with the amount it could raise your property value by. In some areas, a quality basement conversion could earn you money in the long run, but in others it’ll only cost you. If you’re planning on staying in your property for a long time this might not matter to you, but if it’s not your forever home then it’s an important thing to think about.
The best way to go about converting a basement depends on its current condition and what you’d like to use it for.
If you’re happy with its size and structure, and just want to turn it into useful storage space, then your project shouldn’t be too complicated. You’ll simply need to make sure it’s damp proof and waterproof – either by fitting tanking or a cavity drain membrane with a sump and pump. You may also need to invest in new flooring, fit basic lighting, and plaster and paint the walls and ceiling.
If you’d like to turn your basement into living space, then you’ll need to think about ventilation, insulation and heating. If this involves creating a kitchen or bathroom, you’ll also need to incorporate plumbing.
If you want to extend your basement, add lightwells, or fit windows and a sunken garden, this makes things much more complicated. You’ll probably want to hire an architect or basement conversion building specialist to help you with the design and planning, and you’ll need a structural engineer to help you ensure your property is sufficiently supported.
If your basement has a cavity drain membrane, it’ll need a pump to move water away from the exterior of your basement and prevent flooding.
Sump pumps can be noisy, but they don’t have to be. Generally, if you have a well-designed pump that’s installed correctly, you shouldn’t find it a problem. For best results, hire a skilled, experienced professional to supply and install your drainage system.
Windows or lightwells can be a great way to introduce natural light into your basement, making it a more valuable, enjoyable space. However, they’re not always an essential requirement.
It’s important for your basement conversion to meet ventilation and fire safety building regulations. Windows can be a good way to do this, but they’re not the only option. Stack or mechanical ventilation, or ensuring that stairs up from your basement connect to an exit can be a good alternative.
So, while windows can be a great asset to your basement conversion, if you can’t afford them or they’re not structurally feasible, you can still create a basement conversion without them.
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